Uniflow engine



July 24, 1928. 1,678,209 7 H. A. CHUSE UNIFLOW ENGINE 'Filed Feb. '7,1923 2 Sheets-Sheet 1 Q Ma NM fllefll or' H. A. CHUSE ,UNIFLOW ENGINEJuly 24, 1928.,

Filed Feb. 1925 "2 Sheets-Sheet. 2

v or ends and the cylinder head Patented July 24, 1928.

human MATTOON ENGINE wonris, or MATTOON;

. mazes. res learner optics,

HARRY A. onnsnbn marroon, F ILLINOIS, nssienon, BY

nsnn e ssremvrnnrs, r0 ILLINOXS; oonnonanron on rumors.

-' UNIFLOW ENGINE.

Application filed l'lebruary 'i, 1923. SeriaLNor 617,463.

widingnn arrangement that williielilect such" I the ackets that -,deadpockets in which condensation. collects are E avoided. The presentimprovement circulation of steam through seeks to provide a constructionwhichwill rr ng me e -i s am 1 circulation through :PlfOVlClG for; a,positive all portions ot-the jacketing chambers and '5 15 V gthus,insure the more eliicient operation-of the engine and t which twillalso permit the easy; removal of the cylinder head for 1n-1 spectionpurposes. Tllheinventmn consists in i the features oi improvementhereinafter set forth, illustrated ionthe preferred form in, theaccompany ng; drawings and more pan g ticularly pointed out'in the-1appended claims. l isra view partially inielevatlon and a partially inlongitudinalseGtiOn, oil the cylinder of at double acting terminalexhaust engine; providedr with v the present improved endsandithecylinder heads.

t nsv and partly. on the Figzfl is a vertical partly on the line ,;aa;-line b-l' v ofFigaL v o i j j v ,-The terminal exhaust en gineillustrated has the usual\elon- ;at ed piston {1 reciprocatv head formacircular series oiports 18 that ingwithin the c .linder-QI which isprovided with a central exhaust port 3 ports 4 at its ends. The centralexhaust port; is openedmndfrlosed by the piston at v the ends of itsstroke and the inlet ports 4;

are controlled by suitable valves, preferably in the form of poppet orlift valves 5 The end portions of the cylinder are enlarged and coredout to form annular steam jackets 6 that surround the inlet ends of thecylinder bore. At one point, and preferably adjacent its lower sideportion, each jacket is provided with a flanged steam inlet 7 and aconnection 8 is secured to the inlets of both jackets and to the steamsupply pipe. A portion of each jacket alsocommunicates with the inletvalve and in the preferred arrangement shown theoupper portion of eachjacket is provided with a flange 9 surround v ing an opening therein andto which the cap plate 10 pi? a bracket 11 is secured close the opening;brackets 11 :1 suitable type.

acketing the Y inlet I erse section taken and with. inlet guides for theinlet valves and portions of the mechanism by which the-valves, are op"erated and whichflmay be of any, usual or ,Each steam. jacket is dividedinto t o segmental chambers by partition walls 12 which are located atapproximately diametrically opposite points. and at approxiv matelyequal distances from the steam- :inlet 7 Each: steam jacket is thusdivided into twosegmental or substantially semi-circular chambersc and done of which communi' .cates witlrthe steam supply and the other i:withthe inlet valve.

As usual the bore ofthe cylinder is slightly enlarged at. its ends' andhollow heads 13 fitting; vtherein are provided with: flanges 14 whichoverlap and are secured by a circular series of bolts 15. to the-endfaces of the cylinder. The abutting faces of the cylinder and nfiangesare quite vwide and are ground'as usual, ,to form tight joints.

The outer wall of the hollow cylinder head is preferably offset inwardlyfromthe flange zll'lClfOlf greater'strength is connected to the innerwall by an integral, central stud 16. The flange 1a of thehead is ofconsiderable thickness A andv is cored out at.- spaced. inter valsbetween the portions of the flange containing the bolt holes to formrecessesor passages, ii? that conninnflicate with the periplreralportion oi' the steam chamber 6 inthe, cylinder head. Holes drilledthrough the abutting joint iaces of the cylinderand its communicatewith; the passages 17 andthus connect the chamber a of the cylinder headwith, both of the chambers g and cl of the adjacent steam jacket. InefEect these ports are divided into two segmental series, one

series communicating with the steam jacket chamber 0 and the other withthe steam jacket chamber 03.

With this arrangement the steam entering the inlet 7 of the steam jacketcirculates through its chamber 0, passes thence through one segmentalseries of the ports 18 into the chamber 6 of the cylinder head, thenthrough the chamber and the other segmental series of ports 18 into thesteam jacket chamber at and thus to the inlet valve. It is particularlynoted that the two semi-circular series of inlet and outlet ports of thehollow cylin der head are symmetrically arranged and are uniformlydistributed throughout and close 11; adjacent the periphery of thecylinder ports located closely adjacent the head. It is further'not-edthat except for the central connection between theinner and outer wallsof the cylinder head. that the chamber is unobstructed. Because of thisarrangement the steam is uniformly dis tributed and positivelycirculated through out all portions of the steam jacket and the hollowcylinder head, and the collection of condensation in dead spaces orpockets is avoided.

Obviously, changes may be made in the details set forth withoutdeparture from the essentials of the invention as defined in the claims.

Iclaim as my invention:

1. In a terminal exhauststeain engine, a

cylinder having a steam jacket confined to andlencircling its inlet end,said jacket be-' ing divided, into two segmental chambers,

one having a steam supply, an inlet valve,

arranged in the other of said chambers, and a hollow head fort-hecylinder having a circular series of ports arranged closely adja-' centthe periphery of its chamber and communicating with the chambers of thecylinder jacket, the ports communicating with one of saidjacket chambersbeing symmet' rically and diametrically disposed with reference to theports communicating with the.

other of saidchambers, and a hollow cylin der head the chamber of whichis connected with both. of the chambers ofsaid jacket by a uniformlydistributed circular series of p h y of the chamber of the head,substantially as described.

3. In a terminal exhaust engine, a cylinder having a steamjacketlconfined to and encircling its-inlet end, said chamber beingdivided by partitions into two segmental chambers, one having a steaminlet, an inlet valve communicating with the other chamber, and a hollowcylinder head having its inner and'outer walls connected at the centerand periphery of the head but otherwise having, an unobstructed chamber,and sa d head hav ng two,symmetr1cally arranged, semicircular series ofports located closely adjacentithe peripheryof its chamber andcommunicating respectively with the separate chambers of the cylinderjacket,

substantially as described.

4. In a terminal exhaust engine, a cylinder having a steamjja'cketconfinedto and' I encircling its ,inlet end, said steam jacket beingdividedinto two chambers, one having a steam inletfan inlet valveincommunicat-ion with the other of said chambers, and a hollow headfitting within the cylinder rand having a flange overlapping the c'yl-Kinder wall and connected thereto'by'a cir cular series of boltsextending through said cular series of recesses arranged between the.bolts extending therethrough and a circular series of ports "connectingsaid passages with the chambers of the cylinder j acket, substantiallyas described," V

5. In a steam engine, a cylinder provided at its endwith an inletvalvejand an annular steam jacket divided intoitwo segmental chambers,one having a' steam inlet and the other communicating Withsaid inletvalve, and ahollow cylinder headhaving a flange overlappingand'connected by a circular se ries of bolts to theendof the cylinder,the" chamber of said head having a series ofextensions at 1tsper1pheryarranged between the bolts and communicating through a circularseries ofports with the chambers of said jacket. ,i J

i HARRY A. clause.

I flange, the flange ofsaid head having'a cir-

